1-V rail-to-rail operational amplifiers in standard CMOS technology |
| |
Authors: | Duque-Carrillo J.F. Ausin J.L. Torelli G. Valverde J.M. Deminguez M.A. |
| |
Affiliation: | Dept. of Electron. & Electr. Eng., Univ. de Extremadura, Badajoz; |
| |
Abstract: | The constraints on the design of CMOS operational amplifiers with rail-to-rail input range for extremely low supply voltage operation, are addressed. Two design approaches for amplifiers based on complementary input differential pairs and a single input pair, respectively, are presented. The first realizes a feedforward action to accommodate the common-mode (CM) component of the input signals to the amplifier input range. The second approach performs a negative feedback action over the input CM signal. Two operational amplifiers based on the proposed approaches have been designed for 1-V total supply operation, and fabricated in a standard 1.2-μm CMOS process. Experimental results are provided and the corresponding performances are discussed and compared |
| |
Keywords: | |
|
|